remove loop check when aliasing breaks, continues etc - fixes #1051

src/babel/transformation/transformers/es6/block-scoping.js

@@ -527,10 +527,6 @@ class BlockScoping {
     }
 
     if (has.hasBreakContinue) {
-      if (!loop) {
-        throw new Error("Aren't in a loop and we're trying to reassign breaks and continues, something is going wrong here.");
-      }
-
       for (var key in has.map) {
         cases.push(t.switchCase(t.literal(key), [has.map[key]]));
       }

test/fixtures/transformation/es6-block-scoping/issue-1051/actual.js

@@ -0,0 +1,14 @@
+foo.func1 = function() {
+  if (cond1) {
+    for (;;) {
+      if (cond2) {
+        function func2() {}
+        function func3() {}
+        func4(function() {
+          func2();
+        });
+        break;
+      }
+    }
+  }
+};

test/fixtures/transformation/es6-block-scoping/issue-1051/expected.js

@@ -0,0 +1,22 @@
+"use strict";
+
+foo.func1 = function () {
+  if (cond1) {
+    for (;;) {
+      if (cond2) {
+        var _ret = (function () {
+          var func2 = function () {};
+
+          var func3 = function () {};
+
+          func4(function () {
+            func2();
+          });
+          return "break";
+        })();
+
+        if (_ret === "break") break;
+      }
+    }
+  }
+};